On 26 November 2015 at 09:33, Alan Bateman <alan.bate...@oracle.com> wrote: > On 25/11/2015 22:56, Michael Rasmussen wrote: >> >> >> 3) Why was the implementation of java.lang.Package changed, so it no >> longer returns the content of the Manifest file? >> Previously, doing MyClass.class.getPackage().getImplementationTitle() >> would return the "Implementation-Title" entry from the manifest file, >> but now it returns null instead. >> The documentation in JDK8 even mentions that this information is >> typically stored in the manifest, where as the JDK9 now states that >> these values are unspecified. > > If MyClass is packaged as a JAR file with an Implementation-Title attribute > then this should continue to work. I just checked and I don't see any issues > but it's possible my test case doesn't match what you have. If you can > create a short test case then that would be useful to help us see whether > there is a bug here. >
Yeah, I should have been more specific -- the issue is when the package is loaded from the boot loader, for instance when you have an agent that has itself on the Boot-Class-Path in the manifest. Sample code: https://gist.github.com/anonymous/d4f591fc041e676eb8d9 Output: $ java -javaagent:target\test-1.0-SNAPSHOT.jar -version test null 1.0-SNAPSHOT test null 1.0-SNAPSHOT test java version "1.8.0_60" Java(TM) SE Runtime Environment (build 1.8.0_60-b27) Java HotSpot(TM) 64-Bit Server VM (build 25.60-b23, mixed mode) $ java -javaagent:target\test-1.0-SNAPSHOT.jar -version null null null null null null null java version "1.9.0-ea" Java(TM) SE Runtime Environment (build 1.9.0-ea-jigsaw-nightly-h3660-20151022-b86) Java HotSpot(TM) 64-Bit Server VM (build 1.9.0-ea-jigsaw-nightly-h3660-20151022-b86, mixed mode)
